the "SAT way" to complete the square (and also the regular way)
Вставка
- Опубліковано 14 жов 2024
- We are given this quadratic expression x^2+6x+4 and we have to convert it into one of the given choices. We can use the completing square method or the SAT way, which is just plug-in and check. We will do both!
Get a 1.618 t-shirt 👉 bit.ly/1618shirt
Use "WELCOME10" for 10% off
-----------------------------
For more official SAT practice problems, check out 👇
• SAT math questions fro...
Download & try the official SAT practice tests on College Board here: 👇satsuite.colle...
-----------------------------
If you find my channel helpful and would like to support it 💪, then you can
support me Patreon: 👉 / blackpenredpen
or buy a math shirt or a hoodie: 👉 bit.ly/bprp_merch
-----------------------------
"Just Algebra" (by blackpenredpen) is dedicated to helping middle school, high school, and community college students who need to learn algebra. Topics include how to solve various equations (linear equations, quadratic equations, square root equations, rational equations, exponential equations, logarithmic equations, and more), factoring techniques, word problems, functions, graphs, Pythagorean Theorem, and more. We will also cover standardized test problems such as the SAT. Free feel to leave your questions in the comment!
Subscribe for future algebra tutorials 👉 bit.ly/just_al...
-----------------------------
#justalgebra
I solved the question in less than 5 seconds no joke lol. I just simplified the bionomial, and since thats a common one, I already knew it, and then I just had to subtract.
I solved the question in less than 1 second no joke lol. I just skipped to the end of the video.
@@unclegardener lol that's what I did too when I solved the problem
same
Well for (x + 3)² you get a constant of 9 so you'd need a -5 to get to 4. This is the kinda thinking they teach in FIITJEE and other prep schools I've heard. Never saw the use in them myself.
Interesting ways of doing it without actually completing the square.
What I'd do:
(x + b)^2 = x^2 + 2bx + b^2
2b = 6
b = 3
(x + 3)^2 = x^2 + 6x + 9
(x + 3)^2 - 5 = x^2 + 6x + 4
and we're done.
Woahhhh
Saraha ma3andich zhar la f tssahib la f zwaj walit tangoul tawahad maynawad tawahda Matahmal
(x+3)^2-5
So the easiest method and shortest to Do is find the minimum point or maximum of the curve like we already know that for (x+b)²+c the minimum point is ( -b,c). If you plug in - 3 in x²+6x + 4 you get -5 which satisfies the second option . You won't even try plugging in +3 as (x-3)² - c is bound to have an X term that is negative which is unacceptable
I find it hard to believe that the stuff you're posting is actually on the SAT. Give us what you really think are some of the hardest questions you can find. And if this really is how easy the SAT math portion is, well thanks lol
took it yesterday, and yeah, these are what the questions are like.
@@satiatedpanda really? I'm practicing with khanacademy and a lot of the questions are waaaaay harder than this, I got really really worried about what will my results look like. But if they're all like this or easier then yeah, I should just focus on the english section
sub x = 3 gives a number larger than 5, so not (x-3)²
sub x=-3, 9-18+4=-5
B
just use vertex form
I was like:
OK so here we have pos 6x which means the answer is either A or B. I'd wet square 3 we get 9, and wet have to subtract 5 to get 4. Therefore the answer is B! #YAY!
I need more exercise
just took the SAT!
What'd you get bro
O solved in 2sec but i liked
x^2+6x+4
x^2+6x+9+4-9
(x+3)^2-5 🏳️🌈
I solved in 1 min hh lol
The legend of HOTBABY.Uno snowquen's is my idol. Hes the person I aspireo to be, hes my light of day ..QQQQ
Trying to distract your audience from your face by holding a ball tells how unconfident you really are. Leave that ball alone
Bro, it's his mic, he started holding this kind of mics maybe some 4 or 5 years ago because he felt that his left hand feels empty.
MF probably took 1 Psychology class and he thought he knew shit Lmfao
huh?, you sound like a karen